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The brain regulates social behavior differently in males and females, according to a new study. A team of researchers has discovered that serotonin (5-HT) and arginine-vasopressin (AVP) act in opposite ways in males and females to influence aggression and dominance. Because dominance and aggressiveness have been linked to stress resistance, these findings may influence the development of more effective gender-specific treatment strategies for stress-related neuropsychiatric disorders.
Low and very high levels of HDL, or “good cholesterol” are associated with a higher risk of dying from heart disease, cancer and other causes, according to a study. The findings from the first of its kind study suggest that a low level of good cholesterol may not be a heart disease risk factor on its own and that raising HDL does not likely reduce a person’s risk of heart disease.